Chemical heating pad



Sept. 30, 1952 A. MENDEZ CHEMICAL HEATING PAD Filed July 9, 1949 Patented Sept. 30, 1952 UNITED lS OFFICE v .fr 2,612,155 A l y l CHEMICAL HEATING-PAD- ...Arllli'dtrMendez,Ghicagn Ill. mmpplieanfun-July 9,1949, saumur-...103,921

1 claim. 1

This invention relates to chemical heating pads for therapeutic purposes although capable of other uses. -One method of producing heat for the pad is to supply moisture to a chemical mixture in a perforate container or envelope. This envelope is placed between the members of a sectional pillow forming a heat retainer and dispenser which is then applied to the point where heat is desired, as to the person of an individual requiring heat treatment for an ailment, or to, upon or about an object to be heated. such as an infants milk bottle or any small object.

One object is to provide a container for the chemical composition that is inexpensive to produce as a, new container preferably is provided at such time as the heat generating capacity of the mixture has become exhausted.

A further object is to provide a relatively small mixture container that allows for the access of air to the chemical mixture and further to provide a relatively large pad that receives the mixture container and the heat therefrom and that dispenses this heat in desirable quantity in operation. The nature of the chemical mixture is such as to generate heat efficiently over a considerable period of time while the mixture container is disposed between the sections of a pillow.

With the foregoing and other objects in view the invention is set forth in the following specication, particularly pointed out in the claim and illustrated in the accompanying drawing, in which- Fig. 1 is a view in elevation of a chemical heating pad according to a preferred embodiment of the invention.

Fig. 2 is an end View of Fig. 1,v

Fig. 3 is a view of the heating pad in open position showing the sectional pillow and container for the chemical mixture.

Fig. 4 is a vertical cross sectional view through Fig. 1 on the line 44.

Fig. 5 is a face view of one side of a chemical mixture container.

Fig. 6 is an edge view of Fig. 5.

Fig. 7 is a face view of a moisture sheet employed.

Fig. 8 is a cross sectional view through Fig. 5, enlarged, on the line 8 8.

Fig. 9 is an inverted plan view of a modified form of moisture container that may be employed, and,

Fig. 10 is an edge view of Fig. 9.

The reference numeral I denotes a section of the twin sectional pillow, the meeting edges thereof being secured together by a line of stitches 2 so that the sections may be folded into facial engagement or contact, the pillow sections being lled or stuied with steel wool or like material 3. The folded sectional pillow is received in a thin rubber wrapper 4 to which a binding 5 is stitched provided with a zipper 6 to permit insertion and removal of the pillow.

. A relatively small envelope I formed of water proof material receives the chemical mixture, the edges 8 of the envelope being folded together after the mixture has been received in the envelope, one side 9 of the envelope being formed with a plurality of small perforations l0. A small sheet of cotton cloth or like water absorbing material I I of a size sufficient to permit edge portions to be received beneath the folded edges of the envelope is applied to the perforate side 9 and the folded edges then being crimped or pressed firmly together to secure the sheet II in position, the sheet previous to such disposal being saturated with water. The envelope is now placed loosely between the sections of the pillow and the pad closed by the zipper.

The heating compound contained in the envelope is composed as follows: Ten parts of powdered iron to which is added one part activated carbon and the same mixed thoroughly. Then separate therefrom mix thoroughly six parts aluminum powder, one part ferrie chloride (anhydrous), ten parts copper sulfate, ten parts ferrous sulfate. four parts powdered asbestos, the foregoing added in the order named and mixed as added and the entire composition thoroughly mixed after all ingredients are supplied and this mixture then added to the first named mixture when heat over a very considerable period of time is desired. When a somewhat slower reaction is desired the powdered iron and activated carbon may be omitted. The mixture decided upon is then used to more or less fill the envelope.

The sheet II is applied to the envelope after same has received the mixture. When the moisture from the sheet reaches the mixture heat will be generated as suiiicient air is received through the pillow and this heat will be transmitted back through the pillow for a considerable period of time. approximately two hours with the envelope more or less filled with the all inclusive mixture. The sheet I l is moistened or wetted by immersion in Water until saturated.

Referring now only to Figs. 8 and 9 a water absorbent paper envelope i2 is provided which is more or less filled with the mixture and a rubber or natural sponge I3 saturated with water is placed upon the envelope and both placed between the sections of the pillow which is then closed upon said members by the zipper.

What is claimed is:

A chemical heating pad comprising an envelope formed of waterproof material, one side of said envelope being perforate, a water absorbent sheet for application to the perforate side of said envelope when wetted, a heat generating substance contained in said envelope adapted to become active when wetted, a sectional porous folding pillow freely receiving said envelope, a

heat-retaining element lling said pillow, and av The following references are of record in the file of this patent:

Number 15 Number 4 UNITED STATES PATENTS Name Date Allison July 2, 1907 Wertheimer Nov. 7, 1922 McIntyre Mar. 18, 1924 Perrault Dec. 7. 1926 Baker Feb. 14, 1928 Seward Jan. 17, 1933 SimmonsV ,Apr. 3, 1934 Evans Nov. 12, 1935 Lakenbach Aug. 1, 1939 Howells Nov. 6, 1951 FOREIGN PATENTS Country Date France Sept. 12, 1932 Great Britain Aug. 30, 1943 

